Lever-clamp jack



SE15; 16, 1939 MUZZEY 1,775,910

LEVER CLAMP JACK Filed Sept. 26, 1929 llllllll Patented Sept. 16, 1930 PATENT FRED E. MUZZEY, OF HAVERI-IILL, MASSACHUSETTS LEVERCLAMP JACK Application filed September 26, 1929.

The object of my invention is to provide an improved and more eilicient lever clamp jack for use in the wood heel industry; and especially for holding the block while it swings against cutters to be shaped into a heel; and to provide a device of this character which is readily adjustable; and to provide a novel combination and arrangement of parts in such a device.

I attain these and other objects of my invention by the device illustrated in the accompanying drawings, in which Figure 1 is aside elevation of my invention partly in section to show the spring 43 in detail.

Fig. 2 is a rear elevation of a. portion of the invention with member 18 raised to a vertical position.

Referring to the accompanying drawings,

I provide a conventional spindle 1 provided with suitable collars (not shown) for convenience in mounting, and supporting the plates 2 and 5. Plate 5 is provided with a jaw portion 4 to engage the top portion of the inverted wood heel blank or block IV.

Rigidly secured to plate 5 is an upright 31 which is slotted to engage over the plate and which is bolted to it by the bolts 36 and held firmly in place by the pins 35 and 34, the latter engaging the notched edges 32 of the upright. I provide either a slot 38 as indicated in the drawings or a series of open ings', the mechanical equivalent of the slot to permit of adjusting the position of the upright relative to plate 5 by means of bolts 36.

Among the novel elements of my invention is the handle 7, the shank 6 of which is pivotally mounted on plate 5 by bolt 9;

and the turnbuckle 11, the end 10 of which is pivotally connected by bolt 8 to shank 6 of handle 7 while its other end 12 is pivotally connected by bolt 15 to the knuckle joint links 14, and 14'. The lower ends of links 14 are pivotally connected by bolt '17 to the upright 31 and the upper links 14 are pivot- .ally connected by bolt 16 to the knuclne joint lever 18 which is pivotally mounted by bolt 19 on the extension 20 of upright 31.

I provide a clamping screw 24 with the Serial No. 395,320.

usual hand wheel 25, the clamping screw being mounted in the head 22 of knuckle joint lever 18. I provide as one of the novel elements of the device a spring 28 interposed between the hand wheel 25 and the head 22 of knuckle joint lever 18. The lower end of the clamping screw 24 engages a novel round sleeve nut 27 which has a key way out in its to prevent it from turning. It slides up and down through part 31.

I provide a heavy spring 43 interposed between the round sleeve nut 27 and the end 22 of knuckle joint lever 18. I also provide washers 44 above spring 43 and below spring 28 adjacent to end 22 of lever 18. Upper clamp member 29 is provided with a jaw 40 which engages the wood heel blank IV as illustrated. I provide a flat plate spring 39aflixed to upper clamp member 29 and extending into the slotted portion of upright 31 and engaging that element to exert resilient pressure on the clamp member 29.

The provision of the handle, turnbuckle, knuckle joint mechanism, and lever and springs 43 and 28 and sleeve nut are all improvements over the prior art and permit of efficient and rapid operation of the jack.

The operation of the device will be obvious from the foregoing description in connection with the accompanying drawing, in which the device is illustrated in operative position engaging the wood heel blank. To release this wood heel blank the handle member 7 is raised. 7

The heavy spring 43 is to take care of variations of thicknesses of blocks IV and also is strong enough to hold spring tension on part 29 that clamps onto block IV while it is being turned. The purpose of the steel ball 41 on the end of clamping screw 24 is to make the device operate easier, by reducing friction at the point of contact of ball 41 and part 29. There are two toggle links 14 and two toggle links 14four in all, two on each side. When pin or bolt 15 is thrown past center by adjusting nut'll and screw threaded members 12 and 10 and handle 7, it will act as a lock. The round sleeve nut 27 slides up and down through the channel portion of part 31 belng held from turning by a suitable key set in 31 (not shown). Spring 28 which is a light spring is used to lift shaft 24:, handle 25, nut 27, and the heavy spring as when the jack is open. Parts 21 and 31 are riveted together in effect being equivalent to an integral piece,

a while part 20is integral with 31, there being a pair of the members 31 eachhaving the ear 20. I provide a suitable turnbuckle check ,nut- 13, as shown in Fig. 1.

To raise part 3111p or down the clamping screws 36 and 37 on part 5 are used to adjust the'jack for different heights of heels, and

turnbuckle 11 is also used for the same purpose and locks the jack at the same time.

It is necessary to have a collar on part 1 to go between what is called a crane on a turning machine. Part 5 rides on the track (not shown) so that it will not lift. The jack is used to hold the rough block while it swings against cutters to be properly shaped into a wood heel.

I provide a ball end-41 on the lowerendof the clamping screw 24 to engage the upper surface of upper'clamp memberr29 which is pivotally secured by a suitable bolt or pivot 7 30 to the upright 31, 'The ball end makes the device work more easily by reducing friction 1 I may utilize a suitable or conventional gage 4E2 adj ustably bolted to member?) and having its end engaging the breast of a wood heel W or the corresponding portion of the block blank toset theblock in the proper position between the clamping plates {L and 40.

' spindle, jaw, and plate. members, the com-- ing machine.

Imay utilize a suitable-or conventional wooden form orleader 26 the peripheral-portion Ya being used for shaping the heel as it rides against a partof the wood heel turn- 'lZVhat I claimis 1; In alever clamp jack having means for supporting a; wood heel b-lank including a bination with such n'iembersv of a handle, the

shank ofwhich is pivotallyinounted to the aforesaid plate, an upright rigidly aflixed to the plate and having a clamping screw journaled in its upper end, a'hand wheel to adjust the clamping screw, asli'dablesleeve nut on the lower end of the clamping screw,

a knuckle .jointlever pivotally mounted on the upper end of the upright and engaging the clamping screw, a spring interposed betweenthe hand wheel of the clamping screw and the end ofthe knuckle joint lever, aseicbination with such members of a handle, the.

shank of which is pivotally mounted to-the aforesaid plate, an upright rigidly aihXed to the plate and'having a clampingscrew mounted in its upper end, ,a hand Wheel to adjust the clamping screw, a sleeve nut on the lower end of the clamping "screw, a knuckle joint lever pivotally mounted on the upper end of the upright and engaging the clamping screw, a spring interposed between the'hand wheel of theclamping screw and the end Oftheknuckle joint lever, aspring V interposed between the knuckle joint lever and the sleeve nut, links operatively connect-- ing the other end of the knuckle joint lever with the upright, a turnbuckle operatively connecting said linksv with the hand lever, a pivotally mounted upper clamping jaw to engage the wood heel blank, a flat spring engaging the upright and afliXed to the said up per clamp member to tend to lift same ,up-j wardly.

3. In a lever clamp jack of thelt y pe dee scribed, the combination of supporting meansincluding means for engaging .one end ofa 7 wood heelblank, an uprightslottedjto adl a handle pivotally mounted on the'suppenting means, aturnbuckle pivotally ,co'n-nected to the shank of the handle,- links to whichthe turnbuckle is pivotally connected, a knuckle joint lever,pivetallymounted on'eX-tensions of the upright, said links being pivotally connected to the upright and tosaid knuckle joint lever, a clamping screw having a :hand wheel, said clamping; screw being engaged (90 usta'bly engageover said supportingaiaeans,

area

by said knuckle joint lever, a sleeve-nut-on;

the lower'end of the clamping screw, a spring interposed between the hand wheel of the,

clamping screw andthe end of the knuckle joint lever, a second spring interposed between the knuckle joint lever and the sleeve nut,can upper clamp member inoperative engagementwith the lower. endof the clamping screw and adaptedtoengagethe wood' heel blank, and aflat spring engaging said" upper clamp memberjto tend to lift sameupiwardly. I 1 i f 3 4 In a lever clamp jack having mea s'ror supporting a wood heel blanknincluding Ia spindle, jaw and plate members, the, com

bination with such members of a handlet-hea shank of whichis pivotally.mounted to'the aforesaid plate, an upright rigidly affixedito the plate and having a 'clam.ping screw carrying a hand wheel on its upper end journaled in its upper end, a. sleeve nut on the lower end of the clamping screw, avi knuckle,

joint lever pivotally' nounted on the upper end of the uprightand'engagingtheelamp 1 ing screw, a spring interposed'between the hand wheel of the clamping screw-andtheend ofthe knuckle joint leveryauspring terposed between the knuckle joint lever and the sleeve nut, glinks operatively connecting the other end ofthe knucklegjoint lever with 

